usb/cdns3/core.c

29 static int cdns_role_start(struct cdns *cdns, enum usb_role role)
33 	if (WARN_ON(role > USB_ROLE_DEVICE))
37 	cdns->role = role;
40 	if (!cdns->roles[role])
43 	if (cdns->roles[role]->state == CDNS_ROLE_STATE_ACTIVE)
47 	ret = cdns->roles[role]->start(cdns);
49 		cdns->roles[role]->state = CDNS_ROLE_STATE_ACTIVE;
57 	enum usb_role role = cdns->role;
59 	if (WARN_ON(role > USB_ROLE_DEVICE))
62 	if (cdns->roles[role]->state == CDNS_ROLE_STATE_INACTIVE)
66 	cdns->roles[role]->stop(cdns);
67 	cdns->roles[role]->state = CDNS_ROLE_STATE_INACTIVE;
78  * cdns_core_init_role - initialize role of operation
91 	cdns->role = USB_ROLE_NONE;
174 	/* Initialize idle role to start with */
207  * cdns_hw_role_state_machine  - role switch state machine based on hw events.
210  * Returns next role to be entered based on hw events.
214 	enum usb_role role = USB_ROLE_NONE;
219 			role = USB_ROLE_HOST;
221 			role = USB_ROLE_DEVICE;
223 		return role;
232 	 * Previous state: cdns->role
233 	 * Next state: role
235 	role = cdns->role;
237 	switch (role) {
244 			role = USB_ROLE_HOST;
246 			role = USB_ROLE_DEVICE;
250 			role = USB_ROLE_NONE;
254 			role = USB_ROLE_NONE;
258 	dev_dbg(cdns->dev, "role %d -> %d\n", cdns->role, role);
260 	return role;
303 	/* Depends on role switch class */
309 	current_role = cdns->role;
318 	dev_dbg(cdns->dev, "Switching role %d -> %d", current_role, real_role);
322 		/* Back to current role */
336  * cdns_role_get - get current role of controller.
338  * @sw: pointer to USB role switch structure
340  * Returns role
346 	return cdns->role;
350  * cdns_role_set - set current role of controller.
352  * @sw: pointer to USB role switch structure
353  * @role: the previous role
355  * - Role switch for dual-role devices
358 static int cdns_role_set(struct usb_role_switch *sw, enum usb_role role)
365 	if (cdns->role == role)
369 		switch (role) {
379 		switch (role) {
389 	ret = cdns_role_start(cdns, role);
391 		dev_err(cdns->dev, "set role %d has failed\n", role);
412 		if ((cdns->role == USB_ROLE_HOST) && cdns->host_dev)
440 	if (device_property_read_bool(dev, "usb-role-switch")) {
515 	if (cdns->roles[cdns->role]->suspend) {
517 		cdns->roles[cdns->role]->suspend(cdns, false);
533 			cdns->role = cdns_role_get(cdns->role_sw);
536 			if (real_role != cdns->role) {
545 			if (cdns->role == USB_ROLE_HOST)
547 			else if (cdns->role == USB_ROLE_DEVICE)
555 	if (cdns->roles[cdns->role]->resume)
556 		cdns->roles[cdns->role]->resume(cdns, cdns_power_is_lost(cdns));